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Light emitting display device provided with external connection terminal located at peripheral portions of a display area

a display device and peripheral portion technology, applied in the field of current drive-type display devices, can solve the problems of inability to effect display of the entire display panel, inability to prevent thermal deterioration of organic el devices, and increase the frame area of the display apparatus. , to achieve the effect of improving the reliability of the display apparatus and preventing thermal deterioration of the organic el devi

Active Publication Date: 2010-04-06
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to improve the reliability of organic EL display apparatuses without increasing their frame area. It provides a display apparatus with a plurality of light-emitting devices and device control circuits arranged on a substrate in a row and column direction to form a display area. The light-emitting devices are disposed between a lower electrode and an upper electrode on the substrate, and each light-emitting device is connected to an associated device control circuit. The display area also has a first interconnecting line for supplying electric power to the device control circuits and a second interconnecting line that overlaps with the extended upper electrode through an insulating layer. The external connection terminal is connected to both the first and second interconnecting lines. The technical effect of this invention is to prevent thermal deterioration of the organic EL device and improve the reliability of the display apparatus.

Problems solved by technology

In an organic EL panel, when moisture permeates an EL device, an associated pixel results in a defective dot.
In addition, adjacent pixels of the moisture-permeated pixel are successively adversely affected by the moisture-permeated pixel to increase a dark spot as a non-luminous area.
Finally, the entire display panel cannot effect display.
On a side (edge) of the display apparatus where an external (connection) terminal is disposed, current is concentrated, so that Joule heat is problematic.
When the contact hole or an interconnecting line through which large current passes is located in the neighborhood of a display area, a periphery of the contact hole or the interconnecting line is locally heated to result in early deterioration of the organic EL device.
When a part of the display apparatus is early deteriorated compared with another part of the display apparatus, the part of the display apparatus is noticeably visible as irregularities in luminance and color.

Method used

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  • Light emitting display device provided with external connection terminal located at peripheral portions of a display area
  • Light emitting display device provided with external connection terminal located at peripheral portions of a display area
  • Light emitting display device provided with external connection terminal located at peripheral portions of a display area

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0029]A display apparatus according to this embodiment will be described with reference to FIGS. 1-3.

[0030]FIG. 1 shows a schematic plan view of the display apparatus of this embodiment.

[0031]On a substrate 11, a plurality of (unit) pixels each including an EL device and a pixel circuit (FIG. 2) is arranged in a matrix in row and column directions to form a display area 6 having a rectangular shape.

[0032]Outside the display area 6, a peripheral area (circuit and wiring area) 3 in which the peripheral circuits such as the column control circuit for controlling current to be inputted into the pixel circuit for each column pixel, the column shift register, and the row shift register, and interconnecting lines (wiring) specifically described later are formed.

[0033]In the peripheral area 2, a pixel circuit common supply line 1, connected to an external constant voltage source (not shown), for supplying current to the display area 6 and a common voltage line 21 for recovering the current ...

embodiment 2

[0074]Next, Embodiment 2 will be described with reference to FIG. 4 which is a schematic plan view of a display apparatus of this embodiment.

[0075]Referring to FIG. 4, in the display apparatus, a lead-out portion 8b extended to the common voltage line 21 is connected to a central portion of the external terminal 5, and lead-out portions 8a are connected to the external terminal 5 at both sides of the lead-out portion 8b.

[0076]The pixel circuit common supply line 1 disposed on the right and left sides of the display area 6 supplies electric power to the pixel circuit through the power lines 9 in the display area 6. In FIG. 4, two (right and left) portions of the pixel circuit common supply line 1 independently supply electric power but may also be connected with each other by providing a lower interconnecting line below the lead-out portion 8b of the common voltage line 2 to establish the crossing wiring structure in the same manner as in the case of the contact hole 7a described wi...

embodiment 3

[0089]The above described display apparatuses of Embodiments 1 and 2 are capable of constituting an information display apparatus which is an apparatus capable of realizing a mobile phone, a mobile computer, a still camera, a video camera, and a multifunction apparatus of these apparatuses. The information display apparatus includes an information input portion. For example, in the case of the mobile phone, the information input portion is constituted by containing an antenna. In the case of a PDA or the mobile computer, the input portion includes an interface portion for a network. In the case of the still camera or the video (movie) camera, the information input portion includes a sensor portion such as CCD or CMOS.

[0090]As another embodiment of the present invention, a digital camera using the display apparatus described in Embodiment 1 or 2 is used in electronic equipment will be described.

[0091]FIG. 6 is a block diagram of an example thereof of a digital still camera. Referring...

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PUM

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Abstract

A display apparatus capable of preventing thermal deterioration of an organic EL layer to improve a reliability without increasing a frame area thereof includes a display area, a circuit and wiring area, a pixel circuit common supply line, a contact hole, an external connection terminal, and an adhesion area. In the display area, EL devices and pixel circuits are arranged in a matrix. In the contact hole, a common voltage line and a transparent electrode electrically connected to an output of the EL device are electrically connected to each other. To the external connection terminal, an image signal, a control signal, and electric power are externally supplied. The contact hole and the common voltage line are disposed to surround a peripheral of the display area. To the pixel circuit common supply line, the electric power is supplied from the external connection terminal. In a peripheral portion of the display area where the external connection terminal is disposed, the pixel circuit common supply line is disposed outside the contact hole and the common voltage line with respect to the display area.

Description

FIELD OF THE INVENTION AND RELATED ART[0001]The present invention relates to a current drive-type display apparatus and cameras which have an area in which a plurality of constituents each including a current drive-type device and a device control circuit for controlling current passing through the current drive-type device is disposed. The present invention is suitably used in a display apparatus using electroluminescence (EL) devices which produce luminescence by passing current through the devices and are arranged in a matrix.[0002]In recent years, display apparatuses using EL devices have attracted attention as a display apparatus in place of cathode ray tube (CRT) or liquid crystal device (LCD).[0003]In an organic EL panel, when moisture permeates an EL device, an associated pixel results in a defective dot. In addition, adjacent pixels of the moisture-permeated pixel are successively adversely affected by the moisture-permeated pixel to increase a dark spot as a non-luminous a...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01L51/50H01L51/52H05B33/02H05B33/08H05B44/00
CPCH01L27/3276G09G3/3233G09G2300/0861G09G2300/0842H10K59/131
Inventor NAKAMURA, KOHICHIKAWASAKI, SOMEI
Owner CANON KK